2129990 has 8 divisors (see below), whose sum is σ = 3834000. Its totient is φ = 851992.

The previous prime is 2129983. The next prime is 2130001. The reversal of 2129990 is 999212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106490 + ... + 106509.

It is an arithmetic number, because the mean of its divisors is an integer number (479250).

2^2129990 is an apocalyptic number.

2129990 is a deficient number, since it is larger than the sum of its proper divisors (1704010).

2129990 is a wasteful number, since it uses less digits than its factorization.

2129990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213006.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 2129990 is about 1459.4485259851. The cubic root of 2129990 is about 128.6646337686.

The spelling of 2129990 in words is "two million, one hundred twenty-nine thousand, nine hundred ninety".